Surname Petráš (Петраш 
, Petráš 
) , throughout the world, is quite a common last name. The cognomen Petráš is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Ukraine, where it is quite a rare surname, and Czechia. In absolute terms, the name is most common in Eastern Europe, particularly Ukraine, Russia, and Czechia.
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| Петраш | Ukraine, Russia, Kazakhstan, Belarus |
| Petráš | Austria, Slovakia, United States, United Kingdom, Czechia |
| františek petráš Czechoslovak architect, CZ (b. 1885) |
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ladislav petráš Slovak footballer, SK (b. 1946) |
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miroslav petráš Czech music educator and violoncellist, CZ (b. 1948) |
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| alois petráš CZ (b. 1888) |
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| karel petráš CZ (b. 1893) |
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| václav petráš (b. 1893) |
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| lukáš petráš SK (b. 1894) |
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| františek petráš (b. 1897) |
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| július petráš SK (b. 1900) |
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| jakub petráš (b. 1902) |
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| vojtěch petráš CZ (b. 1912) |
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| rudolf petráš AT (b. 1914) |
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| zdeněk petráš Czechoslovak architect (1925-1985), CZ (b. 1925) |
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| miroslav petráš CZ (b. 1916) |
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martin petráš Slovak footballer, SK (b. 1979) |
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Jan, Jarda, Jakub, Josef, Jozef, Juraj, Jirka, Honza, Vlado, Filip, Ondra, Marian, Martin, Miloš, Michal, Mário, Samuel, Andrej, Patrik, Rudolf, Daniel, Dušan, Libor, David, Denis, Riči, Ing, Adam, Kuba, Petr, Laco, Ján, Erik, Ivan, Igor, Marek, Dávid, Matej, Mára, Aleš, Boris, Karel, Pavel, Pavol, Peter, Radim, Radek, Roman, Milan, and Luboš